Scope change.

I have been gathering information about this system. At the end really strange things end up not being true. This is another time it happens. Though the people that were responsible of this before -and supposed to be knowledgeable in Informix- told me the system I posted the other day was not good, I have been doing some testing using LoadRunner and I found what I was told do not seem to be right. At the end, all the reporting functionality in the application goes against another Informix instance. We could say the "online" functionality goes against the Informix I posted the other day and that "reports" go against the Informix instance that shows poor performance. Between these two systems there is transactional replication, which I do not know very well in Informix. The onconfig for this system looks like: #************************************************************************** # # INFORMIX SOFTWARE, INC. # # Title: onconfig.std # Description: Informix Dynamic Server Configuration Parameters # #************************************************************************** # Root Dbspace Configuration ROOTNAME rootdbs # Root dbspace name ROOTPATH X:\\IFMXDATA\\ol_espmadinformix2\\rootdbs_dat.000 #Path for device containing root dbspace ROOTOFFSET 0 # Offset of root dbspace into device (Kbytes) ROOTSIZE 30720 # Size of root dbspace (Kbytes) # Disk Mirroring Configuration Parameters MIRROR 0 # Mirroring flag (Yes = 1, No = 0) MIRRORPATH # Path for device containing mirrored root MIRROROFFSET 0 # Offset into mirrored device (Kbytes) # Physical Log Configuration PHYSDBS physdbs # Location (dbspace) of physical log PHYSFILE 80000 # Physical log file size (Kbytes) # Logical Log Configuration LOGFILES 10 # Number of logical log files LOGSIZE 1500 # Logical log size (Kbytes)LOG_BACKUP_MODE CONT # Logical log backup mode (MANUAL, CONT) # Diagnostics MSGPATH X:\\IFMXDATA\\ol_replica.log # System message log file path CONSOLE X:\\IFMXDATA\\conol_replica.log # System console message path # To automatically backup logical logs, edit alarmprogram.bat and set # BACKUPLOGS=Y ALARMPROGRAM E:\\informix\\etc\\alarmprogram.bat # Alarm program path TBLSPACE_STATS 1 # Maintain tblspace statistics # System Diagnostic Script. # SYSALARMPROGRAM - Full path of the system diagnostic script (e.g. # c:\\informix\\etc\\evidence.bat.) Set this parameter # if you want a different Diagnostic Script than # {INFORMIXDIR}\\etc\\evidence.bat, which is default. # System Archive Tape Device #TAPEDEV nul # Tape device path TAPEDEV L:\\copia # Tape device path TAPEBLK 16 # Tape block size (Kbytes) TAPESIZE 75000000 # Maximum amount of data to put on tape (Kbytes) # Log Archive Tape Device LTAPEDEV X:\\copilog # Log tape device path LTAPEBLK 16 # Log tape block size (Kbytes) LTAPESIZE 80000000 # Max amount of data to put on log tape (Kbytes) # Optical STAGEBLOB # Informix Dynamic Server/Optical staging area OPTICAL_LIB_PATH # Location of Optical Subsystem driver DLL # System Configuration SERVERNUM 1 # Unique id corresponding to a OnLine instance DBSERVERNAME ol_replica # Name of default database server DBSERVERALIASES # List of alternate dbservernames NETTYPE soctcp,2,500,NET # Override sqlhosts nettype parameters DEADLOCK_TIMEOUT 90 # Max time to wait of lock in distributed env. #RESIDENT 0 # Forced residency flag (Yes = 1, No = 0) RESIDENT 1 # Forced residency flag (Yes = 1, No = 0) MULTIPROCESSOR 1 # 0 for single-processor, 1 formulti-processor NUMCPUVPS 2 # Number of user (cpu) vps SINGLE_CPU_VP 0 # If non-zero, limit number of cpu vps toone NOAGE 0 # Process aging AFF_SPROC 0 # Affinity start processor AFF_NPROCS 0 # Affinity number of processors # Shared Memory Parameters LOCKS 500000 # Maximum number of locks#BUFFERS 200000 # Maximum number of shared buffers BUFFERS 300000 # Maximum number of shared buffers NUMAIOVPS 1 # Number of IO vps PHYSBUFF 128 # Physical log buffer size (Kbytes) #LOGBUFF 64 # Logical log buffer size (Kbytes) LOGBUFF 16 # Logical log buffer size (Kbytes) CLEANERS 8 # Number of buffer cleaner processes SHMBASE 0xC000000L # Shared memory base address#SHMVIRTSIZE 128000 # initial virtual shared memory segment size SHMVIRTSIZE 256000 # initial virtual shared memory segment size SHMADD 32768 # Size of new shared memory segments (Kbytes) SHMTOTAL 0 # Total shared memory (Kbytes). 0=>unlimited CKPTINTVL 300 # Check point interval (in sec)#LRUS 64 # Number of LRU queues LRUS 256 # Number of LRU queues LRU_MAX_DIRTY 2 # LRU percent dirty begin cleaning limit LRU_MIN_DIRTY 1 # LRU percent dirty end cleaning limit TXTIMEOUT 300 # Transaction timeout (in sec) STACKSIZE 64 # Stack size (Kbytes) # Dynamic Logging # DYNAMIC_LOGS: # 2 : server automatically add a new logical log when necessary. (ON) # 1 : notify DBA to add new logical logs when necessary. (ON) # 0 : cannot add logical log on the fly. (OFF) # # When dynamic logging is on, we can have higher values for LTXHWM/LTXEHWM, # because the server can add new logical logs during long transaction rollback. # However, to limit the number of new logical logs being added, LTXHWM/LTXEHWM # can be set to smaller values. # # If dynamic logging is off, LTXHWM/LTXEHWM need to be set to smaller values # to avoid long transaction rollback hanging the server due to lack of logical # log space, i.e. 50/60 or lower. DYNAMIC_LOGS 0 LTXHWM 45 LTXEHWM 50 # System Page Size # BUFFSIZE - Dynamic Server no longer supports this configuration parameter. # To determine the page size used by Dynamic Server on your platform # see the last line of output from the command, 'onstat -b'. # Recovery Variables # OFF_RECVRY_THREADS: # Number of parallel worker threads during fast recovery or an offline restore. # ON_RECVRY_THREADS: # Number of parallel worker threads during an online restore. OFF_RECVRY_THREADS 10 # Default number of offline worker threads ON_RECVRY_THREADS 1 # Default number of online worker threads # Data Replication Variables DRINTERVAL 30 # DR max time between DR buffer flushes (in sec) DRTIMEOUT 30 # DR network timeout (in sec) DRLOSTFOUND E:\\INFORMIX\\tmp # DR lost+found file path # CDR Variables CDR_EVALTHREADS 1,2 # evaluator threads (per-cpu-vp,additional) CDR_DSLOCKWAIT 5 # DS lockwait timeout (seconds) CDR_QUEUEMEM 4096 # Maximum memory for any CDR queue (Kbytes) CDR_QHDR_DBSPACE # CDR queue dbspace (default same as catalog) CDR_QDATA_SBSPACE # CDR queue smart blob space CDR_QDATA_SBFLAGS 2 # L

Leopold, If most of your tasks are reporting only and you are using HDR as the log you posted shows, why not run the read only reporting tasks on the DR secondary and reduce the load on your primary server? On a point of information HDR, which you call transactional replication, is very different to the feature of the same name in MS SQL Server. To improve performance try setting OPTCOMPIND to 0. It may persuade the optmiser to use better query plans. Also if you aren't using your table space statistics set TBLSPACE_STATS to 0. Ben.